ul {
    position: absolute;
    top: 660px;
    left: 740px
}

li {
    list-style: none;
    width: 40px;
    height: 20px;
    background: #ccc;
    opacity: 0.5;
    float: left;
    margin-left: 10px;
    border-radius: 20px;
}

.bj {
    background: pink;
    opacity: 0.8;
}